package org.example.config;

import lombok.extern.slf4j.Slf4j;
import org.example.common.JacksonObjectMapper;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j
public class WebMvcConfiguration extends WebMvcConfigurationSupport {


    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters){

        log.info("扩展消息转换器");
        //创建一个消息转换器对象
        MappingJackson2HttpMessageConverter converter=new MappingJackson2HttpMessageConverter();
        //需要将消息转换器设置一个对象转换器，对象转换器可以将Java对象序列化为json数据
        converter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0,converter);
    }

}
